Orville b



(No Model.)

0. B. SKINNER 80G. M. BAG-ON.

ELECTRIC ARC LAMP.

No. 599,480. Patented Feb. 22; 1898.

Smemtow,

3 d A A #1 .7 d m A E f a d P r J wi'cmeooea UNITED STATES PATENT OFFICE,

ORVILLE B. SKINNER AND GEORGE M. BACON, OF CLEVELAND, OHIO,

ASSIGNORS OF ONE-THIRD TO GEORGE G. VELLS, OF SAME PLACE.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 599,480, dated February 22, 1898.

Application filed August 27, 1897. Serial No. 649,680. (No model.)

To all whom it may concern.-

Be it known that we, ORVILLE B. SKINNER and GEORGE M. BACON, citizens of the United States,.residin g at Cleveland, in the county of Ouyahoga and State of-Ohio, have invented certain new and useful Improvements in Electric-Arc Lamps; and we do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable oth-' ers skilled in the art to which it appertains to make and use the same.

Our invention relates to electric-arc lamps. Its object is to increase the efficiency of the lamp; and it consists in the novel features of construction, combination, and correlation of parts, as hereinafter fully described, and specifically pointed out in the claims.

In the drawings, Figure 1 is an elevation, partly in section, of our improved lamp. Figs. 2, 3, and i are details showing, on a slightly larger scale, the construction of various parts.

A is the topplate of the lamp. a a are standards thereon, which at their upper ends carry a plate B, on which is placed an electromagnetic coil D, whose pole-pieces d are secured to the plate B and preferably magneticallyinsulated therefrom, as at 11 The holder E for the upper carbon 6 is tubular and passes through the plates A and B and a guide a terminating above plate B in an armature f, having at each endan inclined face f contiguous to a correspondingly-inclined face (1 on the pole-pieces. At the lower part of the holder E is aflixed a spring g, which bears upon the carbon through an opening 71. in the tube E and forces the carbon into good electricalcontact with its holder and also retains it firmly in place. A trippingstop c' is affixed to the plate A in such a position that when the holder E descends to a determinable extent the stop will engage the spring g and force it out of contact with the carbon, thereby allowing the carbon to slip downward in the holder.

The bottom plate 0 is joined to the top plate A by a mica globe In. Surrounding the carbons and interior to the globe is is a cylinder L, of mica,.closed at the lower end by a plate I, of conducting material, which carries the holder 0 for the lowercarbon j, and to which plate the insulated conductor-m is electrically connected and through which plate the carhon-holder 0 passes. The cylinder L is detachably connected to the plate A, preferably by means of the bayonet-lock seen in Figs. 3 and 4. To effect this look, a rim 0, fitting the upper end of the cylinder L, is formed on or aflixed to the plate A and provided with one or more pins 0 which enter the slots 1 Fig. 4, in the metal rim, which preferably forms the upper end of the cylinder L; or the pins 0? may be on the rim of cylinder L and the slots Z on the rim 0, if preferred. When the cylinder L is in place,-the arc is entirely inclosed, the oxygen of the air is practically excluded, and the escape of gases.

prevented, while the oxidation of the carbons while heated and the deposit of carbon from the gases surrounding the are are almost entirely avoided.

The positive side of the circuit from the line is connected to the "binding-post p, with which one end of the coil D is connected, and after passing through the coil the current passes to the holder E, through the carbons, and by the holder 0, plate Z, and conductor 'm. to the binding-post p and thence to the line. In trimming the lamp the carbons are placed in contact, and when current is switched upon the lamp the current energizes coil D and causes its poles d d to attract the armature f, thus lifting the upper carbon out of contact with the lower and establishing the are. As the carbon wastes the, are finally breaks and the holder E dro {and the spring g is brought in contach lth the tripping-stop i, which releases the carbon and allows it to feed down through its holder E into contact with the lower carbon, which closes the circuit again, and the coil D again lifts the holder E and the arc is instantly reformed, and these operations are repeated continuously. A stop 8 is arranged to limit the upward movement of the armature f to a predetermined extent.

A suitable cap or cover, as t, incloses' the parts above plate B and is provided with the usual means of; suspension to'any insulated holder, or the hook u may he itself insulated from; the lamp. An inclosing cover a), as

shown in dotted lines, may also inclose the 1 stop when the holder descends, to feeddown entirely by a single motion of the hand Withfrom said armature, a' spring retaining the its -top an armature having inclined :faees corresponding-to those of said pole-pieces, said holder havin g a springattachedftheretoand-bearing. on. the carbon .to retain it in the portions between the plates A and B, and any desired globe of glass may inclose the body of'the lamp. v y

By the construction shown and described we dispense entirely with the usual arm or frame extending down to carry the negative carbon and its connection, which when used creates objectionable shadows, and werender the lamp lighter and the trimming ofit quicker, as the cylinder L. can be-detached carloon in said holder, a stop limitin g the play of'saidarmature, and a trip adapted to release said spring,substantially as described:

2L In an" arc-lamp, in combination with a horizontally-disposed electromagnetic coil ha'vingpolapiecesivith inclined faces, a grav ity-actin g tubular! carbon holder carrying at holder andadapt'ed to be tripped by-a fixed the carbon,-=substantially asshown and describe 3. In an arc-lamp. the combination of an i electromagnetic coil having poles, with 111 40 clined faces, a carbon-holder having a top piece which forms an armature having correspondingly-inclined faces, a spring affixed to said holder and bearing on the carbon therein,a stop adapted to trip said spring, a mica cylinder attached to the top plate and inclos'ing the carbons, a conducting-plate closing the bottomof said cylinder, and circuit connections to said coil andfto the bottom of said cylinder, substantially as'deseribed.

4. In'an arc-lamp the combination of an electromagnetic coil in circuit in'series with v the carbons and having pole-pieces with inclinedfaces, anal-mature outside of and parallel to said coil and having inclined faces corresponding to those of said poles, a tubular carbon-holder depending from said armature. and electrically continuous therewith, a stop adapted to limit the" movement of said armature, a spring attached to said holder and bearing on the carbon therein, a rigid stopfixed in the path ofs'aid-"s'pring-and adapted to trip the same, and a. mica cylinder canryingthe lower "carbon and aspiring connectiouforl'the circuit-wire, said cylinder being air-tight and fitting tightlybut detachably upo'n the top plate, whereby thecylina d'erjmay' be: simultaneously detached from v the topplateand the circuit, substantially as described. f I M In testimony whereof we hereto affix our signatures 1n presence'oftwo witnesses.

ORVILLE BL 'SKINNER. GEORGE M. BACON,

Witnesses:

LoRIN PRENTIsS, L, .3. RANDALL. 

